Geoscientific Instrumentation, Methods and Data Systems
Geoscientific Instrumentation, Methods and Data Systems
GI
Articles | Volume 6, issue 2
Articles | Volume 6, issue 2
https://doi.org/10.5194/gi-6-523-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gi-6-523-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 6, issue 2
06 Dec 2017
 | 06 Dec 2017

Extreme isotopologue disequilibrium in molecular SIMS species during SHRIMP geochronology

Charles W. Magee Jr., Martin Danišík, and Terry Mernagh

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Short summary
The paper demonstrates that isotopologue disequilibrium can be created in the SIMS ionization process, and that the specific conditions under which it is created during the oxygen bombardment of geological materials are consistent with known conditions where traditional interrelationships between ion abundances break down. Further study to determine the degree of radiation dosage at which extreme disequilibrium appears involved Raman and helium dating on a variety of well-characterized zircons.
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